As discussed extensively in the literature (see, for example, [1]}, [2]}, and references therein), phenomenological calculations incorporating massive spin-2 states often generate matrix element diagrams which exhibit anomalous high-energy behavior.
Extra-dimensional models of gravity possess an underlying 5D diffeomorphism invariance that ensures their amplitudes are well behaved. That is, any overall bad high-energy growth necessarily signals the omission of additional important physics. Such omissions can produce erroneous phenomenological results.Following our previous computations [3]}, [4]}, [5]} it was shown in [6]} that in freeze-out computations with KK-graviton portal dark matter scenarios exhibit amplitudes that grow no faster than \(\mathcal {O}(s)\)  in an unstabilized model. The stabilized and phenomenologically relevant RS1 model is significantly more difficult to calculate, and will be presented in a future work.
